WinForm控件数据绑定有两种形式:简单数据绑定和复杂数据绑定
简单数据绑定 |
简单的数据绑定是将用户控件的某一个属性绑定至某一个类型实例上的某一属性。
采用如下形式进行绑定:引用控件.DataBindings.Add(“控件属性”, 实例对象, “属性名”, true);
using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["connStr"].ToString()))
{
SqlDataAdapter sda = new SqlDataAdapter("Select * From T_Class Where F_Type='Product' order by F_RootID,F_Orders", conn);
DataSet Ds = new DataSet();
sda.Fill(Ds, "T_Class");
//使用DataSet绑定时,必须同时指明DateMember
this.dataGridView1.DataSource = Ds;
this.dataGridView1.DataMember = "T_Class";
//也可以直接用DataTable来绑定
this.dataGridView1.DataSource = Ds.Tables["T_Class"];
}
从数据库中把数据读出来放到一个数据集中,然后绑定数据源
IList<student> sList=StudentDB.GetAllList();
DataGridView.DataSource=sList;
复杂数据绑定 |
复杂的数据绑定是将一个以列表为基础的用户控件绑定至一个数据对象的列表。
对于复杂数据绑定,常用的数据源类型有
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Collections;
namespace DataGridViewBindingData
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
//this.dataGridView1.DataSource = DataBindingByList1();
//this.dataGridView1.DataSource = DataBindingByList2();
//this.dataGridView1.DataSource = DataBindingByDataTable();
this.dataGridView1.DataSource = DataBindingByBindingSource();
}
/// <summary>
/// IList接口(包括一维数组,ArrayList等)
/// </summary>
/// <returns></returns>
private ArrayList DataBindingByList1()
{
ArrayList Al = new ArrayList();
Al.Add(new PersonInfo("a","-1"));
Al.Add(new PersonInfo("b","-2"));
Al.Add(new PersonInfo("c","-3"));
return Al;
}
/// <summary>
/// IList接口(包括一维数组,ArrayList等)
/// </summary>
/// <returns></returns>
private ArrayList DataBindingByList2()
{
ArrayList list = new ArrayList();
for (int i = 0; i < 10; i++)
{
list.Add(new DictionaryEntry(i.ToString(),i.ToString()+"_List"));
}
return list;
}
/// <summary>
/// IListSource接口(DataTable、DataSet等)
/// </summary>
/// <returns></returns>
private DataTable DataBindingByDataTable()
{
DataTable dt = new DataTable();
DataColumn dc1 = new DataColumn("Name");
DataColumn dc2 = new DataColumn("Value");
dt.Columns.Add(dc1);
dt.Columns.Add(dc2);
for (int i = 1; i <= 10; i++)
{
DataRow dr = dt.NewRow();
dr[0] = i;
dr[1] = i.ToString() + "_DataTable";
dt.Rows.Add(dr);
}
return dt;
}
/// <summary>
/// IBindingListView接口(如BindingSource类)
/// </summary>
/// <returns></returns>
private BindingSource DataBindingByBindingSource()
{
Dictionary<string, string> dic = new Dictionary<string, string>();
for (int i = 0; i < 10; i++)
{
dic.Add(i.ToString(),i.ToString()+"_Dictionary");
}
return new BindingSource(dic,null);
}
}
}